Hello
I am trying to understand fundamentally how generators operated in parallel with a solar PV facility are able to regulate their power output.
I understand the concept of synchronous generation. Basically, for a stand-alone synchronous generator, the rotor induces a voltage into the stator and as current flows in the stator, it induces a voltage back onto the rotor. As load incraeses, rotor speed decreases due to force from induced voltage from the stator. The generator is then loaded with more fuel to bring the rotor back upto required frequency. If load exceeds what the generator is capable of, then the rotor will slow down and frequency of the system will decrease eventually tripping the generator. Apologies if I am not 'technically' correct here, but that's how I understand it in my head.
Ignoring the PV facility for now, when there are two generators operating in parallel on the same grid, I understand one is typically operated in isochronous mode and the other in droop mode. Let's assume the isochronous geneartor is fully loaded, but then load increases beyond the generator rating. The generator in isochronous mode will try to maintain rotor frequency to match the required load frequency, but the generator in droop mode will adjust its power output based on grid demand? How does this happen exactly? If there are additional generators connected, how is the output of the generators in droop mode regulated such that each generator supplies a specified amount of load, in conjunction with the isochronous generator?
If we bring the PV facility online, how do you adjust the output power of the PV facility and hence adjust the output power of the generators in droop mode?
I am trying to understand fundamentally how generators operated in parallel with a solar PV facility are able to regulate their power output.
I understand the concept of synchronous generation. Basically, for a stand-alone synchronous generator, the rotor induces a voltage into the stator and as current flows in the stator, it induces a voltage back onto the rotor. As load incraeses, rotor speed decreases due to force from induced voltage from the stator. The generator is then loaded with more fuel to bring the rotor back upto required frequency. If load exceeds what the generator is capable of, then the rotor will slow down and frequency of the system will decrease eventually tripping the generator. Apologies if I am not 'technically' correct here, but that's how I understand it in my head.
Ignoring the PV facility for now, when there are two generators operating in parallel on the same grid, I understand one is typically operated in isochronous mode and the other in droop mode. Let's assume the isochronous geneartor is fully loaded, but then load increases beyond the generator rating. The generator in isochronous mode will try to maintain rotor frequency to match the required load frequency, but the generator in droop mode will adjust its power output based on grid demand? How does this happen exactly? If there are additional generators connected, how is the output of the generators in droop mode regulated such that each generator supplies a specified amount of load, in conjunction with the isochronous generator?
If we bring the PV facility online, how do you adjust the output power of the PV facility and hence adjust the output power of the generators in droop mode?
